998149901 has 8 divisors (see below), whose sum is σ = 1162266624. Its totient is φ = 839414160.

The previous prime is 998149891. The next prime is 998149909. The reversal of 998149901 is 109941899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998149901 - 2¹⁸ = 997887757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998149901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998149909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344845 + ... + 1345586.

It is an arithmetic number, because the mean of its divisors is an integer number (145283328).

Almost surely, 2^998149901 is an apocalyptic number.

It is an amenable number.

998149901 is a deficient number, since it is larger than the sum of its proper divisors (164116723).

998149901 is a wasteful number, since it uses less digits than its factorization.

998149901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690491.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 998149901 is about 31593.5104254022. The cubic root of 998149901 is about 999.3829196235.

The spelling of 998149901 in words is "nine hundred ninety-eight million, one hundred forty-nine thousand, nine hundred one".